LOL ^^^
Basically if you have a higher Port #, you have PP over them. 2 over 1, 3 over 2, and 4 over all.
If you have PP, then when a move attacks both players in a grab situation, the person with PP will stay, and remain untouched, while the person without PP, will get hit and break the grab.
For example, has it ever happened to you that a Snake D-Threw you while there was a Grenade, and the Grenade exploded and someone got hit, while the other was untouched and stayed on the ground???
That is why. I am pretty sure that is as far as PP goes, but I may be wrong. Look it up if you are curious. Don't claim to be things without proof.